We bend the gcal publisher to allow Google to send us free SMS. This requires
the user to have properly configured his phone on the google calendar.

I tested this on my machine with success. Posting this raw as I have some
issues with hudson creating 2 entries for the gcal plugin on the project
configuration page. Not sure if it is a hudson bug or caused by the plugin

Happy if someone else want to try it further (e.g. wrt to upgrade).